Getting pretty fucking tired of Kishimoto's bullshit. Unless she's really stupid, she knows that the guy has feelings for her. So now that he's finally going after some other girl (possibly as a temporary substitution for Kishimoto and his lust) she catches them in the act and runs towards the rest basically screaming that they're having sex. Subtle as always.
Anyway, I thought it was pretty unnatural that he suddenly wanted to have sex with a girl he just started talking to a minute or so ago, and why just around the corner where everyone else is? But hey, at least he scored with a hot chick quite easily by simply asking, heh.